<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!---角色列表-->
      <el-table :data="rolelist" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--渲染二级和三级权限-->
              <el-col :span="19">
                <!--通过for循环嵌套渲染二级权限-->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button type="danger" icon="el-icon-delete" size="mini"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--分配权限对话框-->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key='id'
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightslist: [],
      //树形控件的属性绑定对象
      treeProps:{
          label:'authName',
          children:'children'
      },
      //默认选中的节点id值数组
      defKeys:[],
      //当前即将分配权限的角色id
      roleId:''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");

      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败！");
      }
      this.rolelist = res.data;

      console.log(this.rolelist);
    },
    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => error);

      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }
      const { data: res } = await this.$http.delete(`roles/
        ${role.id}/rights/${rightId}`);
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败！");
      }
      //this.getRolesList()
      role.children = res.data;
      //防止整个列表刷新
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
        this.roleId=role.id
      //获取所有权限数据
      const { data: res } = await this.$http.get("rights/tree");
      //console.log(res.meta.status);
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败！");
      }
      //把获取到的权限数据保存到list中
      this.rightslist = res.data;
      //console.log(this.rightslist);
      //递归获取三级节点的id
      this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible = true;
        

    },
    //通过递归的形式，获取角色下所有三级权限的id，并保存到数组中defKeys
    getLeafKeys(node,arr){
        //如果当前node节点不包含children属性，则是三级节点
        if(!node.children){
            return arr.push(node.id)
        }
        node.children.forEach(item=>
        this.getLeafKeys(item,arr))
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed(){
        this.defKeys=[]
    },
    //为角色分配权限
    async allotRights(){
        const keys=[
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr=keys.join(',')

        const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
        if(res.meta.status!==200){
            return this.$message.error('分配权限失败！')
        }
        this.$message.success('分配用户权限成功！')
        this.getRolesList()
        this.setRightDialogVisible=false
    }
  },
};
</script>

<style scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>